水媒式烟气换热装置的运行现状分析与优化措施探讨
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摘要
通过现场试验和调研,从烟气温降、系统阻力、除尘效率和SO_3去除率角度,分析水媒式烟气换热装置的运行现状。结果表明,采用水媒式换热装置能够有效提高烟囱排烟温度,实现白色烟羽的消除,同时对烟尘以及SO_3具有明显的脱除效果。分析水媒式换热装置运行中存在的主要问题,并提出相应的优化及解决措施,为水媒式换热装置正常运行提供数据支撑和理论依据。
The gas-water-gas heat exchanging system(WGGH)operation situation is analyzed through field tests and study from the aspects of gas temperature drop,system resistance,dust removing efficiency and SO_3 removing efficiency.The results show that the chimney smoke temperature can be raised through WGGH and the white smoke plume can be eliminated.Meanwhile,the removal of dust and SO_3 has obvious effect.The main problems of WGGH in operation are analyzed and the corresponding optimization and improving measures are proposed to provide important data support and theoretical basis for normal WGGH operation.
The gas-water-gas heat exchanging system(WGGH)operation situation is analyzed through field tests and study from the aspects of gas temperature drop,system resistance,dust removing efficiency and SO_3 removing efficiency.The results show that the chimney smoke temperature can be raised through WGGH and the white smoke plume can be eliminated.Meanwhile,the removal of dust and SO_3 has obvious effect.The main problems of WGGH in operation are analyzed and the corresponding optimization and improving measures are proposed to provide important data support and theoretical basis for normal WGGH operation.
引文
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[2]王贵彦,黄素华.湿法脱硫燃煤机组“白色烟羽”节能治理[J].华电技术,2016,38(11):64-68,79.WANG Guiyan,HUANG Suhua.Wet desulfurization coal-fired unit"white smoke plume"energy saving treatment[J].Huadian Technology,2016,38(11):64-68,79.
[3]张学海,贾兆鹏.600 MW燃煤发电机组烟气超低排放改造方案对比[J].华电技术,2015,37(10):65-68.ZHANG Xuehai,JIA Zhaopeng.Modification scheme comparison of ultra low flue gas emission in 600 MW coal fired generating unit[J].Huadian Technology,2015,37(10):65-68.
[4]刘军,孟桂祥,王祝成,等.国内外低温省煤器技术应用研究进展[J].热能与动力工程,2017,32(11):122-126.LIU Jun,MENG Guixiang,WANG Zhucheng,et al.Recent research progress on the application of low temperature economizer technology[J].Journal of Engineering for Thermal Energy and Power,2017,32(11):122-126.
[5]韩宇,徐钢,杨勇平,等.燃煤电站清洁高效协同的烟气余热深度利用优化系统[J].动力工程学报,2015,35(8):674-680,692.HAN Yu,XU Gang,YANG Yongping,et al.An optimized system for clear,efficient and deep utilization of flue gas waste heat from coal-fired power plants[J].Journal of Chinese Society of Power Engineering,2015,35(8):674-680,692.
[6]赵华,宁玉琴,蒋文,等.火电机组低低温高效烟气处理技术研究及其应用分析[J].应用能源技术,2015(11):16-20.ZHAO Hua,NING Yuqin,JIANG Wen,et al.Research of lower temperature high efficiency flue gas treatment system and its application analysis of coal-fired power plant[J].Applied Energy Technology,2015(11):16-20.
[7]郦建国,郦祝海,何毓忠,等.低低温电除尘技术的研究及应用[J].中国环保产业,2014(3):28-34.LI Jianguo,LI Zhuhai,HE Yuzhong,et al.Research and application on electric precipitation technology with low-low temperature[J].China Environmental Protection Industry,2014(3):28-34.
[8]叶子仪,刘胜强,曾毅夫,等.低低温电除尘技术在燃煤电厂的应用[J].中国环保产业,2015(5):22-25.YE Ziyi,LIU Shengqiang,ZENG Yifu,et al.Application of LLWtemperature ESP in coal-fired power plant[J].China Environmental Protection Industry,2015(5):22-25.
[9]杜振,杨立强,魏宏鸽,等.低低温电除尘器对粉尘特性和SO3脱除效果影响分析[J].中国电力,2017,50(9):122-127.DU Zhen,YANG Liqiang,WEI Hongge,et al.Analysis on the impacts of low-low temperature electrostatic precipitator on dust characteristics and SO3 removal effect[J].Electric Power,2017,50(9):122-127.
[10]刘宇钢,罗志忠,陈刚,等.低温省煤器及MGGH运行中存在典型问题分析及对策[J].东方电气论坛,2016,30(30):31-35.LIU Yugang,LUO Zhizhong,CHEN Gang,et al.Cause analyses on typical operational problems of low temperature economizer and MGGH and proposed countermeasures[J].Dongfang Electric Review,2016,30(30):31-35.
[11]YOSHIO NAKAYAMA,SATOSHINAKAMURA,YASUHIROTAKEUCHI,et al.MHI high efficiency system-proven technology for multi pollutant removal[R].Hiroshima Research&Development Center,2011:1-11.
[12]何毓忠,赵海宝,郦建国,等.低低温电除尘器灰硫比计算及中国煤种分析[J].环境工程,2015,33(2):76-79.HE Yuzhong,ZHAO Haibao,LI Jianguo,et al.Calculation of dust/SO3 ratio for low-low temperature electrostatic precipitator and analysis of coals in China[J].Environmental Engineering,2015,33(2):76-79.
[13]陆军,刘永强,周飞,等.高硫煤机组低低温省煤器SO3协同脱除试验研究[J].热力发电,2016,46(12):30-36.LU Jun,LIU Yongqiang,ZHOU Fei,et al.Experimental research on simultaneous removal of SO3 by low-low temperature economizer in units firing high-sulfur coal[J].Thermal Power Generation,2016,46(12):30-36.
[14]张建中.燃煤烟气降温除尘过程中SO3浓度的浓淡分离现象及对酸露点温度影响的分析[J].锅炉技术,2018,46(3):12-18.ZHANG Jianzhong.Dense-dilute separation phenomenon of SO3concentration during the coal-fired flue gas cooling and dedusting process and analysis on the influence of acid dew point temperature[J].Boiler Technology,2018,46(3):12-18.
[15]张广才,张知翔,车宏伟,等.烟气再热器腐蚀原因分析及对策[J].热力发电,2018,47(4):110-114.ZHANG Guangcai,ZHANG Zhixiang,CHE Hongwei,et al.Cause analysis and countermeasures of corrosion of flue gas reheater[J].Thermal Power Generation,2018,47(4):110-114.
[16]彭钰君.某600 MW机组烟冷器堵灰的原因分析及对策[J].华电技术,2017,39(6):72-74,80.PENG Yujun.The causal analysis and treatment for ash fouling of gas cooler in 600 MW unit[J].Huadian Technology,2017,39(6):72-74,80.
[17]文珏,党岳,曹超.某电厂低低温省煤器磨损机理及改进措施研究[J].机械工程师,2018(9):155-158.WEN Jue,DANG Yue,CAO Chao.Study on wear mechanism and improvement measures of low-low temperature economizer in a power plan[J].Mechanical Engineer,2018(9):155-158.